Construction equipment for repairing damaged coating of steel pipe pile in splash zone and maintenance method of construction equipment

Abstract

The invention provides construction equipment for repairing damage of a coating of a steel pipe pile in a splash zone and a maintenance method of the construction equipment, the construction equipment comprises three cabins with fan-shaped arc empty shell structures, a track and a top cover, and the three cabins are respectively a water tank cabin, a comprehensive operation cabin and a water quality detection cabin. Water obtained after a to-be-repaired structure is cleaned can be taken out through the water tank cabin, the ion removal condition can be effectively represented through the water quality detection cabin, in addition, surface treatment-spraying-maintenance integrated work can be achieved through the comprehensive operation cabin, the overall working efficiency is improved, the service life of a repairing coating is prolonged, and the overall operation life of the structure is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of coating repair technology, and in particular relates to a construction equipment and repair method for repairing coating damage on steel pipe piles in the splash zone. Background Technology

[0002] The harsh marine environment, including ultraviolet radiation, high salinity, alternating wet and dry conditions, marine organism attachment, and mechanical stress, poses a threat to the integrity of steel structure coatings. If the inspection and repair of coatings are neglected for a long time, it will eventually lead to premature failure and damage of marine structures, threatening the safe operation of the structures.

[0003] Typically, when repairing the foundation coatings of marine structures in splash zones, operations such as sandblasting, surface treatment, and painting are easily affected by the variable marine environment, harsh weather (such as high humidity, high salinity, low temperature, and strong winds), and environmental factors. First, residual salt on the surface absorbs moisture, forming salt bridges, reducing the adhesion between the coating and the metal surface, and easily causing coating peeling. Second, when repairing coatings in high humidity and low temperature environments, the curing speed of the paint slows down, and the coating adhesion decreases, affecting the painting progress and quality. Finally, manual underwater repair is costly, and it is difficult to standardize the process of surface treatment, spraying, and maintenance. In addition, the underwater coating repair process may generate harmful substances, polluting water bodies and negatively impacting the marine ecosystem. Therefore, overcoming the influence of surface treatment (surface cleaning, chloride salts, etc.) and environmental factors (humidity, low temperature, etc.) has become a crucial problem that urgently needs to be solved in the repair process. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a construction device and maintenance method for repairing coating damage of steel pipe piles in splash zones, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, according to a first aspect of the present invention, the present invention provides the following technical solution:

[0006] A construction device for repairing coating damage on steel pipe piles in splash zones is characterized by comprising three fan-shaped arc-shaped hollow shell structure chambers, a track, and a top cover. The bottom of the fan-shaped arc-shaped hollow shell structure is an arc-shaped steel plate near the steel pipe pile, while the hollow shell chambers are located away from the steel pipe pile and closer to the external environment. The three chambers are a water tank chamber, a comprehensive operation chamber, and a water quality testing chamber, respectively. The three chambers are fixed in pairs by bolts with water-stopping material.

[0007] The track is connected to the three compartments by three sets of bolts, which are fitted with sealing gaskets.

[0008] The top cover has two semi-circular ring structures, and a sealing ring is fixed on the inner side of the top cover. A sealing strip is installed in the groove of the mating edge of the two semi-circular rings.

[0009] A water spraying mechanism is fixed to the top of the water tank chamber. The water spraying mechanism includes a water tank, a pressure pump, a connecting pipe, and a nozzle. The water tank is connected to the pressure pump through a water inlet connector. The outlet of the pressure pump is connected to one end of the connecting pipe through a pressurization pipe. The other end of the connecting pipe is connected to the nozzle through a clamp. The nozzle is fixed on a track to realize water spraying operation. The chamber has a fan-shaped arc structure. There is an opening at the bottom of the fan-shaped arc structure near the structure to be repaired. A water pump is installed next to the opening. The opening is used to drain the seawater inside the cofferdam.

[0010] The integrated operation compartment is equipped with a frame, on which a surface treatment mechanism, a coating mechanism, a maintenance mechanism, and a power mechanism are mounted. The surface treatment mechanism, the coating mechanism, and the power mechanism are electrically connected.

[0011] The water quality testing chamber is equipped with a water quality testing mechanism, which includes a control system, a turbidity sensor assembly, and a silver nitrate solution reagent bottle. The control system is fixed to the upper part of the frame, and the silver nitrate solution reagent bottle, water tank, and water pump are fixed to the lower part of the frame. The turbidity sensor assembly is fixed inside the water tank, and the silver nitrate solution reagent bottle is placed next to the water tank. The water pump inlet is connected to an external water source, the water pump outlet is connected to the water tank inlet, and the water tank outlet is connected to a waste liquid collection device.

[0012] Furthermore, the surface treatment mechanism includes an air compressor, a sandbox, a spray gun, and a monitoring system; the output end of the air compressor is connected to the air pressure input end of the sandbox through an air pipe, the output end of the sandbox is connected to the input end of the spray gun through a sand pipe, and the nozzle of the spray gun is fixed on the track to perform sandblasting operation.

[0013] Furthermore, the coating mechanism includes a paint pipe, a supply box, a switch, a pressure pump, an electromagnetic induction device, and a paint brush head. The paint brush head is fixed to a track and connected to the supply box via the paint pipe. The supply box has an inlet at the bottom and is connected to a pressure pump to maintain a stable paint supply. The electromagnetic induction device is also fixed on the track. The supply box is connected to the workboat. This structure reduces paint quality problems caused by prolonged storage and allows for timely application of paint to areas with insufficient thickness, ensuring the quality of coating repair.

[0014] Furthermore, the maintenance mechanism includes a base, a heater, a humidifier, an air inlet, a hose, and a sealing ring; the heater and the humidifier are fixed on the base, the air inlet is connected to the space where the structure to be repaired is located via a hose, the sealing ring is sealed at each connection to increase the airtightness, and the maintenance mechanism maintains a stable internal temperature and humidity.

[0015] Furthermore, the power unit includes a solar panel, a controller, an energy storage device, a motor, and a motor connection device. The solar panel is fixed to the outside of the integrated operating cabin, and its output end is connected to the input end of the controller via a connector. The output end of the controller is connected to the input end of the energy storage device via bolts to regulate the electrical energy output by the solar panel. The output end of the energy storage device is connected to the motor via a cable to provide power to the motor. This structure simplifies the power supply, ensures a reliable power source, and reduces carbon emissions and environmental pollution.

[0016] Furthermore, the turbidity sensor assembly includes a sensor and a probe; the sensor is connected to the probe tip via a signal line, and the sensor rear end is connected to the control system via a signal line. This structure makes the turbidity sensor simple and lightweight, and it can provide timely feedback on chloride ion removal.

[0017] Furthermore, the heating fan and humidifier in the maintenance mechanism introduce gas and water vapor into the annular cavity through air vents to maintain the temperature and humidity of the cavity environment.

[0018] Furthermore, all joints were sealed and reinforced with silicone sealant.

[0019] According to a first aspect of the present invention, the present invention provides the following technical solution:

[0020] A method for repairing coating damage on steel pipe piles in splash zones, comprising the following steps, based on the aforementioned construction equipment for repairing coating damage on steel pipe piles in splash zones:

[0021] Step 1: Using the construction vessel, fix the three compartments in pairs with bolts and water-stopping material, clamp the structure to be repaired, and install two semi-circular ring top covers to form a sealed space with the structure to be repaired.

[0022] Step 2: Open the opening at the bottom of the water tank and the water pump to drain the seawater inside the cofferdam, providing a waterless environment for the structure to be repaired and the cofferdam to be repaired.

[0023] Step 3: For structures with damaged coatings, first use a spray nozzle to clean them with water to remove chloride ions from the surface. After one water cleaning, perform a turbidity test.

[0024] Step 4: Place the liquid after one water spray cleaning into the water tank in the water quality testing chamber for silver nitrate testing. The turbidity sensor component monitors the turbidity. The cycle is repeated until the required turbidity is reached to monitor the removal of chloride salts from the surface to be repaired.

[0025] Step 5: Adjust the spray gun to the position to be repaired, and clean it in conjunction with the sandbox to obtain a clean surface structure;

[0026] Step 6: Adjust the brush head to the position to be repaired and spray the coating in conjunction with the feed box;

[0027] Step 7: Turn on the heater and humidifier of the maintenance unit to maintain the newly repaired coating and complete the structural repair and maintenance.

[0028] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0029] 1. The construction equipment and repair method for coating damage repair, through the use of cofferdam structure device, reduces underwater operation time and construction cost, and ensures the personal safety of operators;

[0030] 2. The construction equipment and repair method for coating damage repair, which are connected to the track seat bolts through turbidity sensor and magnetic induction sensor, can adjust the number of chloride salt cleaning and paint coating times according to the collected data, thereby improving the reliability of structural coating repair and increasing the service life of the repaired coating. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall construction equipment for repairing coating damage on steel pipe piles in splash zones according to the present invention;

[0033] Figure 2 This is a top view of a construction device for repairing coating damage on steel pipe piles in splash zones according to the present invention;

[0034] Figure 3 This is a schematic diagram of the water spray mechanism in this invention;

[0035] Figure 4 This is a schematic diagram of the surface treatment mechanism in this invention;

[0036] Figure 5 This is a schematic diagram of the coating mechanism in this invention;

[0037] Figure 6 This is a schematic diagram of the maintenance mechanism in this invention;

[0038] Figure 7 This is a schematic diagram of the power mechanism in this invention;

[0039] Figure 8 This is a schematic diagram of the water quality testing mechanism in this invention;

[0040] Figure 9 This is a schematic diagram of the turbidity sensor assembly in this invention.

[0041] In the diagram: 1-track; 2-top cover; 3-water tank compartment; 4-integrated operation compartment; 5-water quality testing compartment; 6-bolts and waterproofing material;

[0042] 7-Water spray mechanism; 701-Water tank; 702-Pressure pump; 703-Connecting pipe; 704-Sprayer head;

[0043] 8-Surface treatment mechanism; 801-Air compressor; 802-Sandbox; 803-Sand hose; 804-Monitoring system; 805-Spray gun;

[0044] 9-Coating mechanism; 901-Paint pipe; 902-Feed box; 903-Switch; 904-Pressure pump; 905-Electromagnetic inductor; 906-Painting brush head

[0045] 10-Maintenance mechanism; 1001-Base; 1002-Warm air blower; 1003-Humidity meter; 1004-Air inlet; 1005-Hose; 1006-Sealing ring; 1007-Sensor;

[0046] 11-Power mechanism; 1101-Solar panel; 1102-Controller; 1103-Energy storage device; 1104-Motor; 1005-Motor connection device;

[0047] 12-Water quality testing agency; 1201-Control system; 1202-Turbidity sensor assembly; 12021-Sensor; 12022-Spiral probe; 1203-Silver nitrate solution reagent bottle; 1204-Water tank; 1205-Water tank inlet; 1206-Water tank outlet; 1207-Waste liquid collection device; 13-Fixing frame. Detailed Implementation

[0048] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the invention. Similarly, the following embodiments are only some, not all, embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] like Figure 1As shown, the present invention provides a construction device for repairing coating damage of steel pipe piles in splash zones. It includes three fan-shaped arc-shaped hollow shell structure chambers, a track 1 and a top cover 2. The bottom of the fan-shaped arc-shaped hollow shell structure is an arc-shaped steel plate near the steel pipe pile, and the hollow shell chamber is away from the steel pipe pile and close to the external environment. The three chambers are a water tank chamber 3, a comprehensive operation chamber 4 and a water quality testing chamber 5. The three chambers are fixed in pairs by bolts and water-stopping material 6. A water spraying mechanism 7 is fixed on the top of the water tank chamber 3. A mechanism frame is installed inside the comprehensive operation chamber 4. A surface treatment mechanism 8, a coating mechanism 9, a maintenance mechanism 10 and a power mechanism 11 are installed on the mechanism frame. The surface treatment mechanism 8, the coating mechanism 9 and the power mechanism (11) are electrically connected.

[0050] like Figure 3 As shown, a water spraying mechanism 7 is fixed on the top of the water tank compartment 3. The water spraying mechanism includes a water tank 701, a pressure pump 702, a connecting pipe 703, and a nozzle 704. The water tank 701 is connected to the pressure pump 702 through a water inlet pipe. The outlet of the pressure pump 702 is connected to one end of the connecting pipe 703 through a pressurization pipe. The other end of the connecting pipe 703 is connected to the nozzle 704 through a clamp. The nozzle 704 is fixed on the track 1 to realize water spraying operation, remove residual particles and chloride ions after sandblasting, and prevent these impurities from affecting the adhesion and anti-corrosion performance of the coating. The compartment has a fan-shaped arc structure with an opening at the bottom near the structure to be repaired. A water pump is installed next to the opening. The opening is used to drain the seawater inside the cofferdam to provide a waterless environment for the repair of the structure.

[0051] like Figure 4 As shown, the surface treatment mechanism 8 further includes an air compressor 801, a sand box 802, a sand pipe 803, a monitoring system 804, and a spray gun 805. The output end of the air compressor 801 is connected to the air pressure input end of the sand box 802 via an air pipe. The output end of the sand box 802 is connected to the input end of the spray gun 805 via the sand pipe 803. The spray gun 805 is fixed on the track 1 to perform sandblasting. Sandblasting removes rust and old coatings from the surface of the steel pipe pile, providing a smooth and clean surface for coating work, which helps improve the adhesion of subsequent coatings.

[0052] like Figure 5 As shown, the coating mechanism 9 further includes a paint pipe 901, a feed box 902, a switch 903, a pressure pump 904, an electromagnetic induction device 905, and a paint brush head 906. The paint brush head 906 is fixed to the track 1 and connected to the feed box 902 through the paint pipe 901. The feed box 902 has a feed inlet at the bottom and is connected to the pressure pump 904 to maintain a stable paint supply. The electromagnetic induction device 905 is also fixed on the track 1 to detect the coating thickness.

[0053] like Figure 6As shown, the maintenance mechanism 10 further includes a base 1001, a heater 1002, a humidifier 1003, an air inlet 1004, a hose 1005, and a sealing ring 1006; the heater 1002 and the humidifier 1003 are fixed on the base, the air inlet 1004 is connected to the space where the structure to be repaired is located through the hose 1005, the sealing ring 1006 seals each connection to increase the airtightness, and the sensor 1007 is fixed on the top cover 2. The maintenance mechanism maintains the internal environment temperature and humidity stable.

[0054] like Figure 7 As shown, the power mechanism 11 further includes a solar panel 1101, a controller 1102, an energy storage device 1103, a motor 1104, and a motor connection device 1105. The solar panel 1101 is fixed to the outside of the integrated operation cabin 4, and its output end is connected to the input end of the controller 1102 via a connector. The output end of the controller 1102 is connected to the input end of the energy storage device 1103 via bolts, which is used to regulate the electrical energy output by the solar panel. The output end of the energy storage device 1103 is connected to the motor 1104 via a cable to provide power to the motor. This device can ensure the effective transmission and use of electrical energy, and also has environmental advantages.

[0055] like Figure 8-9 As shown, the water quality testing chamber 5 further includes a water quality testing mechanism 12. The water quality testing mechanism 12 includes a control system 1201, a turbidity sensor assembly 1202, and a silver nitrate solution reagent bottle 1203. The control system 1201 is fixed to the upper part of a mounting frame 13. The lower part of the mounting frame 13 is fixed with the silver nitrate solution reagent bottle 1203, a water tank 1204, and a water pump. The turbidity sensor assembly 1202 is fixed inside the water tank 1204. The silver nitrate solution reagent bottle 1203 is placed beside the water tank 1204. The water pump inlet is connected to the water tank inlet 1205, and the water tank outlet 1206 is connected to a waste liquid collection device 1207. The silver nitrate solution can further detect the presence of chloride ions on the surface of the steel pipe pile, preventing corrosion of the coating and improving the overall repair effect. The turbidity sensor assembly needs to be partially immersed in water to operate; by detecting the turbidity of the solution after titration, the degree of chloride salt removal is characterized.

[0056] like Figure 1-9 As shown, the present invention also provides a repair method for repairing coating damage on steel pipe piles in splash zones, comprising the following steps:

[0057] 1. Preparation: Secure the construction equipment to the steel pipe piles to be repaired. Drain the seawater inside the cofferdam through the opening of the water tank chamber 3. Connect the power mechanism 11, ensuring the solar panels are functioning properly to power the motor. Using solar panels for power allows construction to proceed without an external power source, making it particularly suitable for field or marine environments, improving construction flexibility and sustainability.

[0058] 2. Activate the water spray mechanism 7 and use the clean water in the water tank 701 to clean the surface of the steel pipe pile to be repaired, removing chloride ions. Clean water rinsing can remove residual sandblasting particles and chemicals from the surface, especially chloride ions. If these impurities are not removed, they will affect the anti-corrosion performance of the coating.

[0059] 3. Start the water quality testing mechanism 12, and extract the cleaned aqueous solution into the water tank 1204 through the control system 1201. Introduce silver nitrate into the water tank, and then further detect the removal of chloride ions in conjunction with the turbidity sensor component 1202. Repeat the above operation to ensure that the surface of the structure to be repaired does not contain chloride ions that may cause corrosion, and further improve the anti-corrosion effect.

[0060] The working principle of silver nitrate detection:

[0061] NaCl + AgNO3 = NaNO3 + AgCl↓

[0062] CaCl2+2AgNO3=2AgCl↓+Ca(NO3)2

[0063] MgCl2+2AgNO3=2AgCl↓+Mg(NO3)2

[0064] 4. Activate surface treatment mechanism 8 to sandblast the damaged parts of the steel pipe pile to remove surface rust and old coatings. Sandblasting can thoroughly remove rust and old coatings, providing a clean, rough, and highly adhesive surface for subsequent coating operations, ensuring the coating's adhesion.

[0065] 5. The coating mechanism 9 is activated to evenly apply the anti-corrosion coating to the treated steel pipe pile surface. The brush head precisely applies the coating according to the set thickness, ensuring uniformity and thickness. The uniformity of the coating is further checked using an electromagnetic induction device; any problems are addressed promptly. Precise control of the coating thickness and uniformity ensures the anti-corrosion performance and durability of the coating, preventing coating defects and premature failure caused by uneven thickness. During the coating process, the temperature control system and flow switch maintain appropriate coating temperature and flow rate to ensure optimal coating results. Appropriate temperature and flow control prevents problems such as sagging and uneven drying during the coating process, ensuring the quality and performance of the coating.

[0066] 6. Activate maintenance mechanism 10 and use the heater 1002 and humidifier 1003 to regulate the temperature and humidity inside the annular cavity. By regulating the temperature and humidity, a stable construction environment is provided to avoid the influence of external environmental changes on the coating effect, ensuring the curing and adhesion of the coating. Excess gas inside the annular cavity is discharged through the vent to maintain a suitable maintenance environment.

[0067] 7. Real-time monitoring: The 804 monitoring system is used to monitor the construction process in real time, ensuring that each step meets expectations. Real-time monitoring can promptly identify and correct problems during construction, ensuring the quality and efficiency of the entire construction process.

[0068] If any abnormalities are detected, the construction parameters will be adjusted promptly through the control system to ensure the repair effect.

[0069] 8. Construction Completion: After completing the coating and maintenance work, check whether the coating on the surface of the steel pipe pile is uniform and undamaged, and dismantle the construction equipment. Record all construction parameters and monitoring data, and generate a construction report to ensure the traceability of the repair project.

[0070] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A construction device for repairing coating damage on steel pipe piles in splash zones, characterized in that, It includes three fan-shaped arc hollow shell structure compartments, a track (1) and a top cover (2). The bottom of the fan-shaped arc hollow shell structure is a circular arc steel plate near the steel pipe pile, and the hollow shell compartment is away from the steel pipe pile and close to the external environment. The three compartments are a water tank compartment (3), a comprehensive operation compartment (4) and a water quality testing compartment (5). The three compartments are fixed in pairs by bolts and water-stopping material (6). The track (1) is located between the cabin and the steel pipe pile. The track (1) is connected to the three cabins by three sets of bolts, and the bolts are fitted with sealing gaskets. The top cover (2) is a structure of two semi-circular rings. A sealing ring is fixed inside the top cover (2). A sealing strip is installed in the groove of the mating edge of the two semi-circular rings. The top of the water tank compartment (3) is fixed with a water spraying mechanism (7). The water spraying mechanism includes a water tank (701), a pressure pump (702), a connecting pipe (703), and a nozzle (704). The water tank (701) is connected to the pressure pump (702) through a water inlet pipe. The outlet of the pressure pump (702) is connected to one end of the connecting pipe (703) through a pressurization pipe. The other end of the connecting pipe (703) is connected to the nozzle (704) through a clamp. The nozzle (704) is fixed on the track (1) to realize water spraying operation. The compartment is a fan-shaped arc structure. There is an opening at the bottom of the fan-shaped arc structure near the structure to be repaired. A water pump is installed next to the opening. The opening is used to drain the seawater inside the cofferdam. The integrated operation compartment (4) is equipped with a frame, on which a surface treatment mechanism (8), a coating mechanism (9) and a maintenance mechanism (10) are installed. The integrated operation compartment (4) is equipped with a power mechanism (11) on the outside. The surface treatment mechanism (8), the coating mechanism (9) and the power mechanism (11) are electrically connected. The water quality testing chamber (5) is equipped with a water quality testing mechanism (12). The water quality testing mechanism (12) includes a control system (1201), a turbidity sensor assembly (1202), and a silver nitrate solution reagent bottle (1203). The control system (1201) is fixed to the upper part of the fixing frame (13). The silver nitrate solution reagent bottle (1203), a water tank (1204), and a water pump are fixed to the lower part of the fixing frame (13). The turbidity sensor assembly (1202) is fixed inside the water tank (1204). The silver nitrate solution reagent bottle (1203) is placed next to the water tank (1204). The water pump inlet is connected to the water tank inlet (1205). The water tank outlet (1206) is connected to the waste liquid collection device (1207).

2. The construction equipment for repairing coating damage on steel pipe piles in splash zones according to claim 1, characterized in that: The surface treatment mechanism (8) includes an air compressor (801), a sand box (802), a sand pipe (803), a monitoring system (804), and a spray gun (805). The output end of the air compressor (801) is connected to the air pressure input end of the sand box (802) through an air pipe. The output end of the sand box (802) is connected to the input end of the spray gun (805) through a sand pipe (803). The spray gun (805) is fixed on the track (1) to perform sandblasting.

3. The construction equipment for repairing coating damage on steel pipe piles in splash zones according to claim 1, characterized in that: The coating mechanism (9) includes a paint pipe (901), a feed box (902), a switch (903), a pressure pump (904), an electromagnetic induction device (905), and a paint brush head (906). The paint brush head (906) is fixed to the track (1) and connected to the feed box (902) through the paint pipe (901). The feed box (902) has a feed inlet at the bottom and is connected to the pressure pump (904) to maintain a stable supply of paint. An electromagnetic induction device (905) is also fixed on the track (1) to detect the coating thickness.

4. The construction equipment for repairing coating damage on steel pipe piles in splash zones according to claim 1, characterized in that: The maintenance mechanism (10) includes a base (1001), a heater (1002), a humidifier (1003), an air inlet (1004), a hose (1005), and a sealing ring (1006); the heater (1002) and the humidifier (1003) are fixed on the base, the air inlet (1004) is connected to the space where the structure to be repaired is located through the hose (1005), the sealing ring (1006) is sealed at each connection to increase the sealing performance, the sensor (1007) is fixed on the top cover (2), and the maintenance mechanism maintains the internal environment temperature and humidity stability.

5. The construction equipment for repairing coating damage on steel pipe piles in splash zones according to claim 1, characterized in that: In the maintenance mechanism (10), the heater (1002) and the humidifier (1003) input gas and water vapor into the annular cavity through the air inlet (1004) to maintain the temperature and humidity of the cavity environment.

6. The construction equipment for repairing coating damage on steel pipe piles in splash zones according to claim 1, characterized in that: The power unit (11) includes a solar panel (1101), a controller (1102), an energy storage device (1103), a motor (1104), and a motor connection device (1105). The solar panel (1101) is fixed to the outside of the integrated operation cabin (4), and its output end is connected to the input end of the controller (1102) through a connector. The output end of the controller (1102) is connected to the input end of the energy storage device (1103) through a bolt to regulate the electrical energy output by the solar panel. The output end of the energy storage device (1103) is connected to the motor (1104) through a cable to provide power to the motor.

7. The construction equipment for repairing coating damage on steel pipe piles in splash zones according to claim 1, characterized in that: The turbidity sensor assembly (1202) includes a sensor (12021) and a probe (12022). The sensor (12021) is connected to the front end of the probe (12022) via a signal line, and the rear end of the sensor (12021) is connected to the control system (1201) via a signal line.

8. The construction equipment for repairing coating damage on steel pipe piles in splash zones according to claim 1, characterized in that: All joints were sealed and reinforced with silicone sealant.

9. A repair method for repairing coating damage on steel pipe piles in splash zones, characterized in that: The construction equipment for repairing coating damage on steel pipe piles in splash zones, as described in any one of claims 1-8, comprises the following steps: Step 1: Using the construction vessel, fix the three compartments (3)(4)(5) in pairs with bolts and water-stopping material (6), clamp the structure to be repaired, and install two semi-circular ring top covers (2) to form a sealed space with the structure to be repaired; Step 2: Open the opening at the bottom of the water tank compartment (3) and the water pump to drain the seawater inside the cofferdam, providing a waterless condition between the structure to be repaired and the cofferdam to be repaired. Step 3: For structures with damaged coatings, first use a spray nozzle (704) to spray water for cleaning to remove chloride ions from the surface. After one water cleaning, perform turbidity testing. Step 4: Place the liquid after one water spray cleaning into the water tank (1204) of the water quality testing chamber (5) for silver nitrate testing. The turbidity sensor assembly (1202) monitors the turbidity. The cycle is repeated until the required turbidity is reached to monitor the removal of chloride salts from the surface to be repaired. Step 5: Adjust the spray gun (805) to the position to be repaired, and clean it in conjunction with the sand box (802) to obtain a clean surface of the structure to be repaired; Step 6: Adjust the brush head (906) to the position to be repaired, and spray the coating in conjunction with the feed box (902); Step 7: Turn on the heater (1002) and humidifier (1003) of the maintenance mechanism to maintain the newly repaired coating and complete the structural repair and maintenance.

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